The only compressors in mkt with some overhaul option are Sanden and in it there are only few models.
I faced the same problem in my hyundai excell a long time back. I bought the original kabli compressor for quite a reasonable price and just as i put the car on motorway it gave away then i opted for sanden ( i guess it was 509 model).
If you get a kabli (genuine) its price should be reasonable or if you go for sanden, ND or any other with modification just do not forget to get some warrantee from the shop even a weeks warrantee would do
generally there is not much of modification but only a good AC shop knows what to put in lieu as the amount of gas in sys and compressor capacity should be compatable